v260
kernel-install: do not mix || and &&
meson: Fix various versions
kernel-install: handle removal unsuccessful UKIs and loader entries separately
Define $KERNEL_INSTALL_UKI_GENERATOR
kernel-install: allocate "Context" object only in verb_xyz() functions, not already in run()
meson: use files() not find_program() for helper scripts
test: Stop using grep -q in integration test
kernel-install: add uki.conf example